elder



No. 624,773. Patented May 9, I899. J. ELDER.

SEWER. TRAP.

(Application filed Oct. 27, 1898,) (No Model.) 3 SheetsSheet l.

WITNESSES: INVENTOH? ATTORN EY THC Nonms warms 00.. PHO\O-UTHO.,WASHINGTON, o. c.

No. 624,773. Patented May 9, I899.

J. ELDER.

SEWER TRAP.

(Application filed Oct. 27, 1898.) (In Model.) a Sheets-Shoet 2.

WITNESSES: INVENTOR 4;. yaw,

ATT EY ms NORRIS PETERS no, Pncroumq, WASNANGTON. n. c.

No. 624,773. Patented May 9, I899. J. 'ELDER.

SEWER TRAP.

(Application filed Oct. 27, 1898.)

a SheetS-Shaet 3.

(No Model.)

Q h Q R H ow 80w INVENTOR Q m g WITNESSES "ma Noam PETERS co, mom-mum,WASNXNOTON, n c.

1 UNITED STATES PATENT OFFICE.

JOHN ELDER, OF NEWV YORK, N. Y., ASSIGNOR OF ONE-HALF TO ANNIE V. I

BRYAN, OF SAME PLACE.

SEWER-TRAP.

SPECIFICATION forming part of Letters Patent No. 624,773, dated May t),1899.

Application filed October 27, 1898.

To all whom it may concern.-

Be it known that I, JOHN ELDER, a citizen of the United States, residingin New York, (Corona,) in the county of Queens and State of New York,have invented a new and useful Improvement in Sewer-Traps; and I dohereby declare that the following is a full, clear, and exactdescription of the same.

The main objectof my invention is to provide an improved trap fordrain-pipes having a valve which will automatically open to permit thewaste water to escape into the sewer or other drain and willautomatically and positively close, so as to eifectually preventsewer-gas or waste water from backing up through the trap. I attain thisand other important ends, briefly, by means of a trap having a valveoperated by the water-supply and a float-valve which is operated by thewater passing through the trap, so as to control the operation of theWaste-valve by the water-supply.

In order that my invention may be fully understood, I shall firstdescribe in detail the mode in which I carry the same into practice andthen particularly point out the various features of the invention in theclaims.

Reference is to be had to the accompanying drawings, forming partof thisspecification, in which corresponding parts are designated by likeletters'throughout.

Figure 1 is a sectional elevation of a sewertrap constructed inaccordance with my invention. Fig. 2is'a sectional plan view of thesame. Fig. 2 is a detailed view of a part of the same hereinafterdescribed. Fig. 3 is a sectional elevation representing a modificationof my invention. Fig. 4. is a reduced sectional view of part of thesame.

The trap illustrated in Figs. 1 and 2 is formed with an inletA,conneoted to the drainpipe leading from the house, a U-bend B,

which holds the Water-seal, an outlet 0, which is connected to the seweror street drain-pipe O, a plugged cleaning-pipe D, a verticalplunger-chamber E, and an outlet F, which is protected by a strainer andis connected by a pipe H Witha tank I, containing a valve actuatingfloat P.

At the junction of' the bend and wasteoutlet 0 is formed a valve-seat K,which is Serial No. 694,658. (No model.)

fitted to and normally closed by a valve L, so as to effectually preventsewer-gas or waste water from backing up from the waste-pipe 0 throughthe trap.

The valve L is carried by a tubular stem L, which is fitted to Workvertically in the stuffing-box L of a diaphragm L extending across thevertical plunger-chamber E. above the waste-outlet C, and on the upperend of the valve-stem L is fixed a plungerM, fitted to work in thechamber E. I The upper end of the chamber E being closed by a screwplugE the hollow stem L of the valve permits the air to escape therethroughwhen the plunger moves, and this prevents its being locked by the air.

Through the diaphragm L extend small escape-orifices L having simpleflap-valves L which when the valve L is raised to its fullest extent arepressed thereby against, so g as to close the orifices L and prevent thewater from escaping therethrough.

Into the chamber E above the diaphragm L leads a pipe N, which isconnected to the main water-supply under pressure and which is normallyclosed by a valve 0. The valve 0 has a sliding'stem 0 extending to thetank I into position to be operated by the head P of the pivoted floatP. The head P forms one arm of an angle-lever, to which the float P isadjustably secured by a set-screw and stem, as shown in Fig. 2, saidangle-lever be ing pivoted to a fixed bracket and itsupwardly-projecting arm pressing against the valve-stem O in a mannersimilar to that illustrated in Fig. 3 in connection with the float B. Bythis arrangement when waste water runs from the house into the bend B ofthe trap, the waste-valve L' being closed, it (the waste water) flowsoutward through the branch pipe into the tank I, thereby raising thefloat P, which in turn opens the supply-valve O. The water undersupply-pressure then'runs through the supply-pipe N into the chamber Eabove the diaphragm L and, acting on the under side of the plunger M,positively raises the same, and thus the waste-valve L, and perinits thewaste water to escape from the trap into the waste-pipe C". After thewaste ,water has run out it falls into the tank I, permit.- ting thefloat P to fall and the supply-valve to shut off the supply from thepipe N. The water in the chamber E abovezthediaphragm L then escapesthrough the orifices L washes the valve L, and causes the same to falland close the trap against sewer-gas and backwater. I

The modified form of my trap (show-nin' part in Figs. 3 and 4) isprovided-with means, i substantially as shown in Figs. 1 and 2, forpositively opening the waste-valve L to permit the waste water to escapeand, in addition thereto, with means for positively closing the valve Lagainst backwater from the. sewer. I accomplish this, brieflyyby causingthe water backing up in the waste-pipe 'C to operate afloat-valve, whichin turn causes the; water-supply to close the waste-valve L. v

.Asshown in Figs 3 and 4, the waste-pipe i 0 opens into afloat-tankQ,'iu which is .a pivoted float '3, having an arm R in operat-f ingconnection with the stem S of a double;

valve .8. The valveS is arrangedalternately; .to cut off the pipe N,which leads from the; valve Ointo .the'plunger-chamberE, as shown inFigs. 1 and 2, and another water-supply pipe T, which leads into theplunger-chamber Eabove the valve-actuating plunger .M. Ini the .upperend of the tubular valve-stem L is? a spring-held valve U, which will beheld open by its spring to permit theair to escape when i the plunger Mrises, but will beclosed by the f water under pressure coming from thesupply-pipe T,,and thereby cause said supply to depress the plunger Mand valve L. The operation of this modified form of apparatusl 11's asfollows: When the waste water runs; from the houseintothetrap, the valveL will be opened and the waste water permitted to escape .asand by themeans described in connection with Figs. 1 and 2, the double val-ve. Snormally leaving the supply-pipe Nopen to be con-trolled by the valve-O,as previously described. \V-hen, however, the water from" the sewer vorstreet-drain from any cause backs up into the waste-pipe C, it entersthe; float-tank Q, raises the that R, and shifts the Z valve S, so as tomake it open the pipe T and close the pipe The pressure is therefore cutoff from the plunger M and admitted into the chamber E above saidplunger, thereby positively closing the waste-valve L and effectuallypreventing the water from backing up through thetrap. When thewaste-Water fioatR .falls again, the trap is set for operation by thefloat-valve O, as before described.

I claim as my invention 1. Atrapfordrain-pipescomprisingincombination awaste-valve, a plunger-chamber, a plunger therein connected to thewasteval've, a Water-supply pipe leading into the plunger-chamber avalve in the water-supply .pipe, a waste-water tank connected to the itrap, and a fioat in the tank to operate the supply-valve.

2. YA trap fordrain-.pipes-comprising in combination a waste-valve, .aplunger-chamber, a plunger therein, a perforated diaphragm separatingthe plunger-chamber from the waste-valve, the valve-stem working throughsaid diaphragm and carrying the plunger, a water-supply pipe leadinginto the plungerchamber, a valveinthe water-supply pipe, a waste-watertank connected to the trap, and ,a float in said tank to operate thesupplyvalve.

3. ,A trap for drain-pipes'comprisingincombination ,a waste-valve, aplunger-chamber, .a plunger .therein connected to the wastevalve,water-supply pipes leading into the plunger-chamber on both sides .ofthe plunger, valves to cut off both said supply-pipes, a Waste-watertank connected to the trap, a back water-tank connected to thewaste-pipe, and floats in said tanks to operate said valves alternately.

In testimony whereof I have hereunto set my hand the 16th dayoflJuly,1898.

JOHN ELDER.

In presence of HENRY W. STROTHMANN, JOHN LUTONACKRE.

